Unknown problem

Action:

Disconnect power to the server.

Following the guidelines and cautionary
information in the server documentation, strip the server to its
most basic configuration by removing every card or device that is
not necessary to start the server. Keep the monitor connected to
view the server startup process.

CAUTION: Only
authorized technicians trained by HP should attempt to remove the
system board. If you believe the system board requires replacement,
contact HP
Technical Support before proceeding.

If the system fails in this minimum
configuration, one of the primary components has failed. If you
have already verified that the processor, PPM, power supply, and
memory are working before getting to this point, replace the system
board. If not, be sure each of those components is working.

If the system boots and video is working,
add each component back to the server one at a time, restarting the
server after each component is added to determine if that component
is the cause of the problem. When adding each component back to the
server, be sure to disconnect power to the server and follow the
guidelines and cautionary information in the server
documentation.